Zoology-Mechanism of Breathing
NEET Zoology Mechanism of Breathing MCQ Question
Type: MCQ-diagram based-Medium-Class 11
A diagram shows the thoracic chamber and the respiratory system, including the lungs, ribs, and diaphragm. Which structure is responsible for changing the volume of the thoracic chamber during breathing?
A
Diaphragm
B
Sternum
C
Vertebral column
D
Alveoli
Correct Answer
Option A
Detailed Explanation
The diaphragm is a muscle that contracts and relaxes to change the volume of the thoracic chamber, facilitating inspiration and expiration.
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